Ō'cher or Ō'chre, n.

(ō'ker), n. [Fr. ocre, Sp. ocra, ocre, It. ocra, ocria, Lat. ochra, Gr. ὤχρα, from ὠχρός, pale, pale yellow.] (Min.) A variety of fine clay, containing iron. The common colors are yellow and red; the latter variety being colored by the sesquioxide of iron, and the yellow by the hydrous sesquioxide. Green, blue, and black clays are also sometimes called ochres. [Written also oker.]